2158252849 has 3 divisors (see below), whose sum is σ = 2158299307. Its totient is φ = 2158206392.

The previous prime is 2158252777. The next prime is 2158252853. The reversal of 2158252849 is 9482528512.

The square root of 2158252849 is 46457.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1813482225 + 344770624 = 42585^2 + 18568^2 .

It is not a de Polignac number, because 2158252849 - 2⁹ = 2158252337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2158252799 and 2158252808.

It is not an unprimeable number, because it can be changed into a prime (2158253849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 23229 + ... + 69685.

Almost surely, 2^2158252849 is an apocalyptic number.

2158252849 is the 46457-th square number.

2158252849 is the 23229-th centered octagonal number.

It is an amenable number.

2158252849 is a deficient number, since it is larger than the sum of its proper divisors (46458).

2158252849 is an frugal number, since it uses more digits than its factorization.

2158252849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92914 (or 46457 counting only the distinct ones).

The product of its digits is 460800, while the sum is 46.

The cubic root of 2158252849 is about 1292.3121901238.

It can be divided in two parts, 2 and 158252849, that added together give a palindrome (158252851).

The spelling of 2158252849 in words is "two billion, one hundred fifty-eight million, two hundred fifty-two thousand, eight hundred forty-nine".